公开(公告)号：US08269189B2

公开(公告)日：2012-09-18

申请号：US12742769

申请日：2008-11-13

申请人： Chang-ming Ma ,  Iavor Veltchev ,  Eugene S. Fourkal

发明人： Chang-ming Ma ,  Iavor Veltchev ,  Eugene S. Fourkal

IPC分类号： H01J49/06

CPC分类号： H05H15/00

摘要： The energy of positive ions accelerated in laser-matter interaction experiments can be significantly increased by providing a plurality of laser pulses, e.g., through the process of splitting the incoming laser pulse, to form multiple laser-matter interaction stages. From a thermodynamic point of view, the splitting procedure can be viewed as an effective way of increasing the efficiency of energy transfer from the laser light to positive ions, which energy peaks for processes having the least amount of entropy gain. A 100% increase in the energy efficiency is achieved for a six-stage laser positive ion accelerator compared to a single-stage laser positive ion accelerator.

摘要翻译： 激光物质相互作用实验中加速的正离子的能量可以通过提供多个激光脉冲，例如通过分离入射的激光脉冲的过程形成多个激光物质相互作用阶段来显着增加。 从热力学的角度来看，分裂过程可以被看作是提高从激光到正离子的能量转移效率的有效方式，对于具有最小熵增益的过程的能量峰值。 与单级激光正离子加速器相比，六级激光正离子加速器的能量效率提高了100％。

公开(公告)号：US20090230318A1

公开(公告)日：2009-09-17

申请号：US11720886

申请日：2005-12-22

申请人： Eugene S Fourkal ,  Iavor Veltchev ,  Chang Ming Ma

发明人： Eugene S Fourkal ,  Iavor Veltchev ,  Chang Ming Ma

IPC分类号： H01J27/00 ,  G21K1/00 ,  A61N5/00

CPC分类号： H01J27/24 ,  G21B1/19 ,  H01L21/268 ,  Y02E30/16

摘要： Methods for designing a laser-accelerated ion beam are disclosed. The methods include modeling a system including a heavy ion layer, an electric field, and high energy light positive ions having a maximum light positive ion energy, correlating physical parameters of the heavy ion layer, the electric field, and the maximum light positive ion energy using the model, and varying the parameters of the heavy ion layer to optimize the energy distribution of the high energy light positive ions. One method includes analyzing the acceleration of light positive ions, for example protons, through interaction of a high-power laser pulse with a double-layer target using two-dimensional particle-in-cell (PIC) simulations and a one-dimensional analytical model. The maximum energy acquired by the accelerated light positive ions, e.g., protons, in this model depends on the physical characteristics of the heavy-ion layer—the electron-ion mass ratio and effective charge state of the ions. The hydrodynamic equations for both electron and heavy ion species solved and the test-particle approximation for the protons is applied. It was found that the heavy ion motion modifies the longitudinal electric field distribution, thus changing the acceleration conditions for the light positive ions.

摘要翻译： 公开了设计激光加速离子束的方法。 所述方法包括对包括重离子层，电场和具有最大的光正离子能量的高能量的光正离子进行建模，将重离子层的物理参数，电场和最大的光正离子能量相关联 使用该模型，改变重离子层的参数，以优化高能光阳离子的能量分布。 一种方法包括通过使用二维粒子单元（PIC）模拟的高功率激光脉冲与双层靶的相互作用来分析光正离子（例如质子）的加速度，以及一维分析模型 。 在该模型中由加速的光正离子（例如质子）获得的最大能量取决于重离子层的物理特性 - 离子的电子 - 离子质量比和有效电荷状态。 解决了电子和重离子物质的流体动力学方程，并应用质子的测试粒子近似。 发现重离子运动改变纵向电场分布，从而改变光正离子的加速条件。

公开(公告)号：US20100320394A1

公开(公告)日：2010-12-23

申请号：US12742769

申请日：2008-11-13

申请人： Chang-ming Ma ,  Iavor Veltchev ,  Eugene S. Fourkal

发明人： Chang-ming Ma ,  Iavor Veltchev ,  Eugene S. Fourkal

IPC分类号： H05H15/00 ,  H01J27/00

CPC分类号： H05H15/00

摘要： The energy of positive ions accelerated in laser-matter interaction experiments can be significantly increased by providing a plurality of laser pulses, e.g., through the process of splitting the incoming laser pulse, to form multiple laser-matter interaction stages. From a thermodynamic point of view, the splitting procedure can be viewed as an effective way of increasing the efficiency of energy transfer from the laser light to positive ions, which energy peaks for processes having the least amount of entropy gain. A 100% increase in the energy efficiency is achieved for a six-stage laser positive ion accelerator compared to a single-stage laser positive ion accelerator.

摘要翻译： 激光物质相互作用实验中加速的正离子的能量可以通过提供多个激光脉冲，例如通过分离入射的激光脉冲的过程形成多个激光物质相互作用阶段来显着增加。 从热力学的角度来看，分裂过程可以被看作是提高从激光到正离子的能量转移效率的有效方式，对于具有最小熵增益的过程的能量峰值。 与单级激光正离子加速器相比，六级激光正离子加速器的能量效率提高了100％。